<!DOCTYPE html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>

<div id="testElement"></div>

<script>

// Append
test(function() {
  assert_throws_js(TypeError, function() {
    testElement.attributeStyleMap.append('width', new CSSUnitValue(60, 'px'));
  });
}, "Attempting to append to a property that doesn't support multiple values throws");

test(function() {
  // TODO(meade): Use a property that supports multiple values when that is available.
  assert_throws_js(TypeError, function() {
    testElement.attributeStyleMap.append('width', new CSSUnitValue(70, 'number'));
  });
}, "Appending an invalid type to a property throws");

test(function() {
  assert_throws_js(TypeError, function() {
    testElement.attributeStyleMap.append('lemons', new CSSUnitValue(6, 'number'));
  });
}, "Attempting to append to an invalid property throws");

</script>
